The HKS F-CON S is a plug-in engine management system that offers full tuning capability for turbocharged, supercharged and naturally-aspirated applications.  Encompassing the features of a stand-alone system with the integration ease of a “plug & play” system, the F-CON S allows for a full range of tuning without the loss of standard main operating functions and the need to rewire components and sensors. The F-CON S provides full fuel management and ignition timing control by utilizing the factory fuel and ignition baseline curves as reference points and makes adjustments incrementally or by re-scaling the curve to configure a new map.  The ignition timing adjustments can also be made within the range of ± 15° of the factory calibrations.   Each fuel and ignition curve of the F-CON S is a 16x24 point (Load vs. Rpm) resolution map. Up to 4 different fuel and ignition maps can be stored internally and set for various configurations.  For additional fuel enrichment, a built-in AIC function can control up to two additional injectors.  The F-CON S can also be tuned to utilize larger primary fuel injectors and maintain a correct idle mixture. The unit also incorporates built-in circuitry to eliminate fuel and speed limiters on certain applications.   The F-CON S can be used on virtually any fuel -injected engine with up to 6 cylinders. By using the factory airflow/pressure, throttle position, water temp, intake air temp and speed signals, the F-CON S recalculates the original map data with inputs from HKS sensors to enable engine management functions that are even more precise than the stock computer. An internal self-diagnostic function, can determine errors not only in the F-CON S main unit and in its direct input signals, but also errors in the airflow/pressure, crank angle, throttle, water temp, and intake sensors of the factory system, is built into each unit to ensure reliable management.